Calculating-machine.



E. JAHNZ. GALGULATING MACHINE. APPLICATION FILED 00T.5,19o9.

Patented Maf. 15,1910.

a SHEETS-SHEET 1.

E. JAHNZ. GALGULATI'NG MACHINE. APPLIOATION FILED 00T.5, 1909.

Patented Mar. 15, 1910.`

3 SHEETS-SHEET 2.

` E. JAHNZ.

CALGULATING MACHINE.

APPLICATION FILED 00T. 5, 1909.

Patented Mar. 15, 1910.

3 SHEETS-SHEET 3.

UNITED sTATr s PATENT OFFICE ERWIN JAHNZ, 0F BERLIN, GERMANY, SSIGNOR TOGRIMME, NATALIS & CO., KOMMANDITGESELLSCHAFT, AUF AKTIEN, BRAUNSCHWEIG,OF BRUNSWICK, GERMANY, A. CORPORATION OF GERMANY.

CALCULATING-MACHINE.

Specification of Letters Patent.

Patented Mar. 15, 1910.

Application led October 5,11909. Serial No. 521,128.

To all whom it may concern; l

Be it known that I, ERWI'N J AHNZ, engineer, a subject of the Emperor ofGermany, residing at, Berlin, Province of Brandenburg,-l{ingdom ofPrussia, Empire of Germany, have invented certain new and usefulImprovements in Calculating-Machines, of which the following is aspecification.

My invention relates to improvements in calculating machines in whichthe values of the calculation are set on a setting mechanism by means ofcani disks, slides, or keys, whereupon they are transmitted toa'registering mechanism. In machines of this class it is sometimesdesirable .to set the result obtained in the registering mechanism onthe setting mechanism `by means of the said cam disks, slides,"or keys,which may be necessary for example, if the said result is required in afurther operation, or if the result is to be printed by means of aprinting mechanism coperatlng with the setting mechanism. d

My invention consists in providing means, whereby the said settingoperation can be effected in a. simple Way.

For the purpose of explaining the invention several examples embodyingthe same have been shown in the accompanying drawings in which the samecharacters of reference have been used in all the views to indicatecorresponding parts.

In said drawings-Figure 1, is a front view of a calculating machinepartly in section, Fig. 2, is a vertical cross-section of the saidmachine taken on the line 22 of Fig. l, Fig. 3, isa verticalcross-section of the machine illustrated in Figs. l and 2 1n which amodification of the transmitting means is shown, Fig. 3a, is aAperspective view of a detail of the machine shown in Fig. 3, Fig. 4, isa. vertical cross-section of a different type of a calculating machineequipped with transmitting devices, Fig. 4a, is a detail section of aportion of the mechanism shown by Fig. 4 and taken in a plane at rightangles to the plane of section of said Fig. 4, Fig. l5, is a plan of themachine shown in Fig. 5 partly in section, Fig. 6, is a verticallongitudinal cross-section illustrating the invention as embodied in atype of a machine in whichkeys are used for setting the values, and Fig.7, is a detail from which rise vertical side Walls.99, 99 l providing asupport for the setting mechanism. The latter is inclosed by a casing 2.The registering mechanism is mounted on a carriage G which islongitudinally slidable in a groove of the. base plate. The settingmechanism is mounted on a horizontal rotaryshaft 1 to which settingdisks a are secured. Each of the said disks carries nine radiallymovable teeth a. Adjacent to the disks a cam disks b are loosel mountedon the shaft l which are provide with handles 1 rojecting through slotsof the casing 2, an( which are formed with cam slots b2. The teeth .eare formed with lateral noses el projecting into said cam slots b2. Byrotating the cam disks b at a certain angle a corresponding number ofthe teeth e are forced outward beyond the periphery of the disks a. Ifnow the disks aand b are rotated by means of a crank 3, the projectedteeth z engage in gear wheels e loosely mounted on a common shaft c1, soas to advance the latter a corresponding number of teeth. Thereby alsothe number wheels cl are rotated which are operatively connected withthe gear Wheels e by means of gear wheels d1. The registerin Wheels dare loosely mounted on a sha t Z2 supported in side walls 90 risin fromthe base plate ofthe carriage G. T ey are provided about theirperipheries with the numerical characters from l to 9 and thezero sign,and the latter can be dis layed through peep holes g. Carryingmecianisms 4, 4', 5, 5 of any preferred or known construction areprovided in my improved machine, -which do not form a part of myinvention and therefore need no detailed description. By shifting thecarriage`6 laterally, the setting disks a can be brought into coperationwith any of the number wheels of a higher order.

The resetting mechanism provided in my improved machine consists ofradial pins 7 secured to the shaft d2 and coperating with abutments 8provided on the number wheels d. Normally the pins 7 are out of thepaths of the abutments 8, but they can be shifted into the path of thelatter by shifting the shaft d2 laterally. As shown such shiftingmovement is imparted to the shaft d2 by means of a earn ring 9 securedthereto and cooperating with a similar cam ring 10 secured to the sidewall 90 of the carriage 6. By turning the cam ring 9 in the direction ofthe arrow z, (Fig. 2 the shaft cl2 is shifted laterally, so that t epins 7 can engage the abutments 8 and thereby rotate the number wheels linto their zero positions.

Referring now to the features of construction constituting my presentinvention: in my improved machine means are provided whereby the numberwheels d and the cam disks b can be operatively connected with eachother in such a Way, that upon resetting the number wheels d suchmovement is transmitted to the cam disks, and the direction of rotationis such, that when rotating the number wheels d in the direction of thearrow z. shown in Fig. 2 the cam disks are rotated in the direction ofthe arrow c. rIhereby a. number of teeth is thrown outward in each ofthe setting disks a which corresponds to the value set on the coperatingnumber wheel. For this purpose each of the cam disks I) is provided,about its circumference with gear teeth s ada ted to be thrown' intomesh with the teet of the cooperating gear wheel e. As shown in thefigures, the said teeth are normally out of engagement with each other,and they can be thrown into cooperation by shifting the carriage 6supporting the registering mechanism. Therefore, when resetting thenumber wheels the values represented thereby can be transmitted to thecam disks b, so that so many of the teeth z as correspond to the saidvalues are thrown into operative position relatively to the settingdisks b. If for example one of the number Wheels d displays the number 4through the peep hole g, and if now the said wheel is reset by rotatinthe same in the direction of the arrow L, t e cam disk b is rotated bymeans of the gear wheel e into a position in which four teeth z arethrown into operative position. Therefore the number 4 is transmittedfrom the registering mechanism to the setting mechanism.

In the example shown in Figs. 3 and 3, toothed racks Ic are used foroperatively connecting the cam disks b and the number wheels d, whichracks coperate with the gear wheels d1 of the wheels Z and with gearteeth s of the cam disks b. Normally said racks are out of mesh with theteeth s and d1. As shown each of the racks 1c is supported on links 13',13 the upper pivots of which engage in a longitudinal slot k1 of therack, so that the latter can slide in a longitudinal direction. Byrocking the said links upward and in the direction of the arrows m and nthe said rack is lifted into engagement with the gear teeth s and di. Asshown all the links 13', 13 are mounted on longitudinal rock shafts 47and 48 respectively which are connected by a link 37 jointed to crankarms 13, 13. The link 37 carries a button 36. By means of the latter allthe links 13 can be simultaneously rocked upward. When the said linksare in their rocked positions, the setting mechanism a, b and the numberwheels d are operatively connected with each other, so that uponresetting the registering wheels the values represented thereby aretransmitted to the setting mechanism.

In Figs 4, 4a and 5 ll have shown an example illustrating how theinvention may be embodied in a machine of a different construction. Asshown in' said Figs. 4, 41 and 5 the casing ofthe machine consists of abase plate 55, vertical walls 56 rising from the latter, and a cover 14.The setting mechanism consists of a plurality of rotary cylinders 17supported with one of their pivots in the wall 56 of the casing and withtheir opposite pivots in a bracket 59 rising from the base plate 55.Each of the cylinders 17 is provided about its circumference with nineelongated teeth 18 of gradually increasing lengths. Above the saidcylinder a rotary shaft 16 is mounted in suitable bearings, and saidshaft carries a gear wheel 7' which can Slide .longitudinally on saidshaft, while it is rotated 'thereby in any of its positions. As shownthe shaft 16 is made of square cross-section. The gear wheel 1' can beshifted laterally by means of a button 'i having an arm 15 extendingdownward through a slot 1 of the casing and engaging' in acircumferential groove of the hub of the gear wheel fr. By shifting thegear wheel 7 longitudinally of the cylinder 17 it is brought into thepath of one or more of the teeth 18. The gear wheel 7' can be adjustedaccording to the value to be set on the setting mechanism by means of ascale provided on the upper side of the casing of the machine andadjacent to the slot l through which the button z' extends down Ward.Said scale indicates the different positions of the gear Wheel 7' fromthe zero7 position to the nine position. One of the pivots of thecylinder 17 is provided with a bevel gear 19 which is in mesh with abevel Gear 20 secured to a crank shaft 21. If the latter is rotated,such rotary movement is transmitted through the bevelgears 20, 19, theteeth 18 of the cylinder 17, and the gear wheel r to the shaft 16, sothat the latter is rotated in a reater or less degree according lto theposition of the gear wheel r relatively to the cylinder 17 and thenumber of teeth 18 engaged by the gear wheel r. The crank 21 isconnected in the manner described with all the cylinders 17. The shaft16 carries a bevel gear 22 which is in mesh with a. bevel gear 23rigidly connected with a horizontal number wheel 60. At its upper sidethe number wheel is provided with the numerical characters from 1 to 9and the zero sign, and it is adapted to display the same throu h a peephole 24 of the cover 14 of the'mac ine.

The resetting mechanism consists of means for disconnecting theregistering mechanism from the setting mechanism, and of means forrotating the number wheels into their zero positions. As shown the meansfor disconnecting the registering mechanism from the setting mechanismconsist of la rock shaft 74 carrying a plurality of cams 43 one for eachof the shafts 16. The latter are provided with arms 72 adapted to beengaged lby said cams. Normally the shafts 16 are forced into theirright hand positions by means of springs 76. If the shaft 74 is rockedin the direction of the arrow shown in Fig. 4, for example by means of acrank 42, the cam disks 43 shift the shafts 16 toward the left, untilthe bevel gears 22 are yout of engagement with the bevel gears 23.

Vhen the crank 42 is released, the shafts 16 are forced into theirnormal positions by .the springs 76. Extending longitudinally of thecasing of the machine a rotary shaft 25 is mounted in the side walls ofthe casin the machine, and the said shaft is provided with a cam ring 79whereby it can be shifted laterally. The said cam ring and coperatingparts are similar to the corresponding parts 9 and 10 described withreference to Figs. 1 and 2, and they need no further description.Loosely mounted on said shaft 25 is a plurality of gear wheels 25 onefor each of the number wheels 60, and each of the said gear wheelscarries a pin 44 adapted to be engaged b a radial pin 45 secured to theshaft 25. ormally the pins 45 are out of the paths of the pins 44. Iftheshaft 25 is shifted laterally, the pins 45- are moved into theiroperative positions relatively to `the pins 44, and when rotating thesaid shaft the gear wheels 25 are rotated. The gear wheels 25 areoperatively connected with the bevel gears 23 through intermediate gearwheels 63, so that the rotation of the shaft 25 is transmitted to thebevel gears 23 and the number wheels 60 so as to reset the latter.

A gear wheel 77 is rigidly connected with each of the number wheels 60,and is adapted tocoperate with a toothed rack 0 piv otally connected tothe button z'. The rack o is normally thrown out of engagement with thegear wheel 71 by turning the button i, and to set up engagement betweenthe rack and gear the said button is turned in a reverse direction. Ifthe button 1I is in its zero position, as shown in Figs. 4 and 5, andthe rack o is thrown into engagement with the gear wheel p, the resettinmovement of the cooperating number whee 60 is transmitted to the buttoni, so that the latter, and the gear Wheel 1' connected therewith areshifted into the position corresponding to the, value represented by thenumberwheel. 'lhereby the values represented by the registeringmechanism are transmitted to the setting mechanism, so that the saidvalues can directly be used in a further calculation.

In Figs. 6 and 7 I have shown a type of a calculating machine in whichthe values are set on the settin mechanism by means of vertically movabe keys 26 normallyY held in their elevated or inoperative positions bycoiled springs 41 and adapted to be held in their depressed positions bymeans ot a spring actuated slide bar 27 common to all the keys of thesame column. If a key is depressed, the slide bar 27 is pushed rearwardagainst the action of its spring 64 by an inclined heel 26 formed at thelower end of the stem 66 of cach key, and it is at once pulled lforwardagain, so as to'engage a shoulder formed by the upper part of said heel.When thus locked 1n its depressed position the stem 66V of the key 26forms an abutment for a bar 29 which at its rear end is formed with rackteeth 29. The latter are in engagement with a gear Wheel 31 connectedwith a'number wheel 30. The bars 29 are formed with cam faces 29 whichstrike against the lower ends of the key stems 66, when they are thrownrearward by means of gear wheels 28 rotated by a crank 28 andcooperating with teeth 29 formed on the lower sides of the bars 29. Whenthe bars 29 strike against the key stems 66, they are rocked downwardsufficiently as to retract their teeth 29 out of engagement with thegear wheels 31. Therefore each bar 29 can advance its number wheel onlya distance which corresponds to the value represented by the depressedkey 4l,` though upon each rotation of the crank it performs a fullrearward stroke.. I'.

After the teeth 29 ofthe bar 29 have been thrown into engagement withthe gear. wheel 31, which may be donev for example by means of a spring38, the rack is retracted either by hand, or, as shown, by means of aspring 39 which has been putunder tension by the previous rearwardshiftingmovement -of the bar 29. To prevent the gear wheel 28 frominterfering with the return movement of the bar 29, .a cam 4() isprovided which engages below a cam face 29 and thereby lifts the bar 29out of engagement with the gear wheel 28. as soon as the crank 28 hascompleted a full revolutiom'and theA bar 29 has been shifted to theright. While the bar 29 is thus being retracted, the elongated cam face29 revents the teeth 29 and the gear whee 28 from coming into mesh witheach other, because the cam 40 slides along the face 29". The keys 41locked in their depressed positions by the slides 27 are released bmeans of push buttons 27 which when orced rearward permit the springs 41to throw the keys upward into their normal positions.

In the present example the connection between each of the number wheelsand its setting mechanism consists of a toothed rack 33 adapted to bethrown into engagement with a gear wheel 32 secured to the number wheel30. At its front end the said rack is connected with a sliding cam 34coperating with all the keys of the same column. The stems 66 of thekeys 41 are provided with pins 26 projecting laterally therefrom andinto the path of the cam 34. If the rack 33 is `in engagement with thegear wheel 32 and the registering mechanism is reset in any known orpreferred way, the rack is shifted rearward, and upon such rearwardmovement the cam 34 successively engages the )gins 26 of the keys.. Eachkey is there y depressed and lockedl in its depressed position by theslide bar 27 and it is released again by the next key forced downward bythe cam 34, so that finally only the last one of the keys engaged by thecam 34 is held in its depressed position. As in the resetting operationthe number wheel is rotated a certain angle which corresponds to thevalue represented by said number wheel, the rack is shifted backward adistance which corresponds to such angle, so that it is stopped below akey the value of which corresponds to the value represented by thenumber wheel.

In the preferred form of the machine means are provided whereby theracks 33 can be thrown in or out of operation. As shown the racks arepivotally mounted on posts 67 extending upward from the cams 34, andthey can be held in engagement with the gear wheels 32 by a spring 68.At the front side of each of the posts 67 a latch 69 is provided whichcan be rockedv into engagement with an arm 70 extending forward from therack 33. If the said latch is in engagement with the arm, the rack 33 isin a slightly lifted position as shown in Fig. 6, in which its teeth areout of mesh with the gear wheel 32.

Any preferred resetting mechanism may be provided in my machine. Asshown the machine is equipped with a resetting mechanism which issimilar in construction to that described with reference to Figs. l and2. In Fig. 7 the said resetting mechanism is shown in detail. As shownin said figure, the number wheels are loosely mounted on a rotary shaft81 adapted to be shifted laterally by means of a cam ring 82. lThe saidshaft carries radial pins 83 one for each of the number wheels, and thelatter are provided witli coperating abutments 84. As shown the saidpins are normally out of the paths of the abutments 84, and they areshifted into their operative positions by the shifting movement of theshaft 81. If now the shaft 81 is rotated its pins move the number wheelsinto their zero positions.

I claim:

1. In a calculating machine, the combination with registering mechanism,setting mechanism, and resetting mechanism for the registeringmechanism, of gear mechanism to transmit resetting movement of theregistering mechanism to the setting mechanism and having temporaryengagement with relation to the registering and setting mechanisms.

2. In a calculating machine, the combination with registering mechanism,setting mechanism, and resetting mechanism for the registeringmechanism, of gear mechanism cooperating with both the registering andsetting mechanisms to transmit tlie resetting movement of theregistering mechanism to the setting mechanism and normally ininoperative position relatively to the registering and settingmechanisms, and means for throwing the said gear mechanism intooperation.

3. In a calculating machine, the combination with registering mechanism,setting mechanism, and resetting mechanism for the registeringmechanism, of toothed devices operating both with the registeringmechanism and setting mechanism to transmit the resetting movement ofthe registering mechanism to the settin mechanism, and means to throwsaid toot ed devices into or out of operation relatively to theregistering and setting mechanisms.

4. In a calcuclating machine, the combination, with the settingmachanism, the registering mechanism, the resetting mechanism, and acarriage supporting said registerinU mechanism and resetting mechanisman adapted to be shifted longitudinally of said setting mechanism, oftoothed gearings on said setting mechanism and registering mechanismadapted to be thrown into engagement with each other by the combinedresetting and carriage shifting operations and to transmit the resettingmovement to the setting mechanism.

5. In a calculating machine, the combination with a rotary setting diskprovided with a plurality of radially movable teeth, a rotary cani diskadapted to shift one or more of said teeth into operative position andprovided about its circumference with gear teeth, a number wheel, and agear wheel connected therewith and adapted to be rotated by theoperative teeth of said bined resetting and carriage shifting operationsand to transmit the resetting move 10 ment to said cam disk.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses. A

ERWIN J AHNZ. Witnesses:

HENRY HASPER, VVOLDEMAR HAUPT.

